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Kirkendall Effect in Creating Three-Dimensional Metal Catalysts for Hierarchically Porous Ultrathin Graphite with Unique Properties.
- Source :
-
Chemistry of Materials . Jun2017, Vol. 29 Issue 11, p4991-4998. 8p. - Publication Year :
- 2017
-
Abstract
- In this work, we report an innovative mechanism, the Kirkendall effect, in creating three-dimensional (3D) microporous catalysts with tunable pore sizes for the growth of hierarchic ultrathin graphite foams (HP-UGFs) with unique properties. Employing the Kirkendall effect is one of the first demonstrated for fabricating 3D porous catalysts, where tunable pores of 1.9–8.3 μm are created on 3D interconnected struts (∼100 μm). With the catalysts, we readily synthesized freestanding HP-UGFs that offer higher crystallinity and electric conductivity, larger surface area, as well as enhanced electric invariance to strains compared to those of conventional ultrathin graphite foams. A gauge factor as low as ∼10 at a strain as high as 80% is achieved owing to the unique porous corrugations created on the microstruts of the HP-UGFs. This work may inspire a new paradigm in designing and synthesizing a new type of 3D porous architecture made of 2D materials with controlled local corrugations, which could greatly benefit flexible electronics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAL catalysts
*KIRKENDALL effect
*GRAPHITE
*CRYSTALLINITY
*ELECTRIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 08974756
- Volume :
- 29
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Chemistry of Materials
- Publication Type :
- Academic Journal
- Accession number :
- 123591848
- Full Text :
- https://doi.org/10.1021/acs.chemmater.7b01518